Syntax: override on|off

    The override command is useful when looking at or modifying
    databases other than an alias database. Ordinarily the database
    manipulation commands, add, copy, modify, rename, remove, set,
    and show will only operate on aliases with the mail-address
    attribute. When the command "override on" has been issued, these
    commands can be used to manipulate any entry in the database
    regardless of its attributes (or lack thereof).

    The "override off" command negates the "override on" command.